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DEC Alpha

Alpha (originally Alpha AXP) is a 64-bit reduced instruction set computer (RISC) instruction set architecture (ISA) developed by Digital Equipment Corporation (DEC). Alpha was designed to replace 32-bit VAX complex instruction set computers (CISC) and to be a highly competitive RISC processor for Unix workstations and similar markets.

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Bits
64-bit
Design
RISC
Designer
Digital Equipment Corporation
Encoding
Fixed
Endianness
Bi
Extensions
Byte/Word Extension (BWX), Square-root and Floating-point Convert Extension (FIX), Count Extension (CIX), Motion Video Instructions (MVI)

Topics to explore

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Overview

History

Design principles

Registers

Data types

Memory

Instruction set

Extensions

Implementations

Performance

Alpha-based systems

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Map overview Semantic statistics

DEC Alpha

Nodes173
Edges172
Triples42
Avg. degree1.99
Density0.011561
Components1

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DEC Alpha

Top relations

related to Alpha-based systems · 19
DEC Alpha → Alpha, AXP, Celebris XL, DEC, DEC Alpha-based, DECpc AXP, Digital Personal Workstation PC, EISA, Extended Industry Standard Architecture, Futurebus, Jensen, MIPS-based DECstation, PC, The, The DEC, This, TURBOchannel, VAX, Windows NT
Bits · 1
DEC Alpha → 64-bit
Design · 1
DEC Alpha → RISC
Designer · 1
DEC Alpha → Digital Equipment Corporation
Encoding · 1
DEC Alpha → Fixed
Endianness · 1
DEC Alpha → Bi
Extensions · 1
DEC Alpha → Byte/Word Extension (BWX), Square-root and Floating-point Convert Extension (FIX), Count Extension (CIX), Motion Video Instructions (MVI)
Floating-point · 1
DEC Alpha → 31 plus always-0.0 F31
General-purpose · 1
DEC Alpha → 31 plus always-zero R31
Introduced · 1
DEC Alpha → 1992; 34 years ago (1992)

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Important terminology

alpha instructions architecture dec vax instruction register integer registers risc first used prism systems design also 64-bit digital processor bits

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
DEC AlphaBits64-bit1.00infobox
DEC AlphaDesignRISC1.00infobox
DEC AlphaDesignerDigital Equipment Corporation1.00infobox
DEC AlphaEncodingFixed1.00infobox
DEC AlphaEndiannessBi1.00infobox
DEC AlphaExtensionsByte/Word Extension (BWX), Square-root and Floating-point Convert Extension (FIX), Count Extension (CIX), Motion Video Instructions (MVI)1.00infobox
DEC AlphaFloating-point31 plus always-0.0 F311.00infobox
DEC AlphaGeneral-purpose31 plus always-zero R311.00infobox
DEC AlphaIntroduced1992; 34 years ago (1992)1.00infobox
DEC AlphaOpenNo1.00infobox
DEC AlphaTypeLoad–store1.00infobox
TLBsinstance ofAlthough the unused bits were not implemented in hardware0.80text

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